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i2c: i801: Restore configuration at shutdown
authorJean Delvare <jdelvare@suse.de>
Wed, 11 Apr 2018 16:05:34 +0000 (18:05 +0200)
committerWolfram Sang <wsa@the-dreams.de>
Wed, 11 Apr 2018 21:08:13 +0000 (23:08 +0200)
commita6958155f85abf4736d38c711648087e78d749b0
tree16fe45f9a16a4827353f515a50bbbceac1657d17tree | snapshot
parent4a05942f8ebe24381b42093a63a2f7445606861dcommit | diff
i2c: i801: Restore configuration at shutdown

On some systems, the BIOS expects certain SMBus register values to
match the hardware defaults. Restore these configuration registers at
shutdown time to avoid confusing the BIOS. This avoids hard-locking
such systems upon reboot.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Jason Andryuk <jandryuk@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@vger.kernel.org
drivers/i2c/busses/i2c-i801.c diff | blob | history
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